Why should the majority share my opinion? Maybe I am wrong. Maybe it would be boring, because there wouldn't be discussions any more.
Different opinions may coexist.
....because in a democracy, majority vote rules
So obviously if you want something to change...
Protests also needs to convince but in protests consent/dissent is not even measured ...
Protests aren't meant to persuade - they're meant to draw attention. Persuasion is a separate step in the movement. Look at BlackLivesMatter. The initial protests drew attention to issues of police brutality that most Americans had little knowledge of. Then, journalists contextualized the history of police violence and attempted to persuade readers. Protests also help frame a narrative, which make people more amenable to persuasion.